Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Durante quais anos o Guarda de Oklahoma com uma altura de 6-6 jogou para os Rockets?
 ###Tabelas: CREATE TABLE career_nascar_statistics (career_nascar_statistics_id AUTO_INCREMENT PRIMARY KEY, Year INT, Races INT, Wins INT, Poles INT, Top 5 INT, Top 10 INT, DNF INT, Finish VARCHAR, Start VARCHAR, Winnings VARCHAR, Season Rank VARCHAR, Team(s) VARCHAR) CREATE TABLE most_games_for_each_club (most_games_for_each_club_id AUTO_INCREMENT PRIMARY KEY, Rank VARCHAR, Games VARCHAR, Player VARCHAR, Club VARCHAR, Career span VARCHAR) CREATE TABLE b (b_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, No.(s) VARCHAR, Height in Ft. VARCHAR, Position VARCHAR, Years for Rockets VARCHAR, School/Club Team/Country VARCHAR) CREATE TABLE episodes_and_ratings (episodes_and_ratings_id AUTO_INCREMENT PRIMARY KEY, Episode INT, First broadcast Denmark ( DR1 ) VARCHAR, Official TNS Gallup ratings INT, First broadcast UK ( BBC Four ) VARCHAR, Official BARB ratings INT) CREATE TABLE round_eight (round_eight_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Time VARCHAR, Home VARCHAR, Away VARCHAR, Score VARCHAR, Ground VARCHAR)  
SELECT Years for Rockets FROM b WHERE Height in Ft. = 6-6 AND Position = guard AND School/Club Team/Country = oklahoma